best camera for beginning pro?

I do mostly outdoor portraits, nature, and landscape, but want to get into indoor and weddings. One thing I am looking for is ease in changing aperature and shutter speeds. I like to play with these alot when photographing moving water or sports. I would like to spend less than $2000, but I'm not going to let price become a major issue, as I have bought many 2-$600 cameras for amateur shooting, and have just been disappointed. One last thing , the shutter speed needs to be as fast as possible.

Hi,
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It still looks like nobody has taken the time to answer your question, well here goes..

A beginning pro that wants quick and easy aperture/speed changes plus the best speed for sports and fast moving objects under $2000. There is only ONE camera that fills that requirement, the Canon 40D is what you need and it's under $1,200. You will have to spend about $2,800 to get a faster camera, the next step up in speed is the Canon 1D Mk-II.

Some people may recommend the Nikon D300 which is going for about $1,900, it's a great camera but will not be as fast. Similar to it's predecessor the D200 vs. the Canon 30D, the high ISO performance is lagging behind the Canon 40D. Get into a low-light situation and the 40D will always do a better job, and it's $700 less, that leaves you money to invest in a fast lens to go along with the faster camera.

I hope you already discovered this considering how long this question has been out here.